Platen printing-press and the like.



, :s. H. uunsmb'm. PL'ATEN PHINIING PRESS AND THE LIKE.

AP P LICATION 'HLED Dec. 1, 1m.

WMMM. 13, 1917.

e. a. LmnsTRb'M. v PLATEN PRINTING PRESS AND THE LIKE. v Arr-Heme" FILEDDEC-7,1915- V 3 1,219,1 19. Patenfid Mar; 13, 1917.

2 MEETS-SHEET 2- to the platen,

UNITED- STATES coarse abuser ramcars, or eorraunoae,

manner. nmns'rabm, or co'r'rnnaoao,

Specification of Letters Patent...

SWEDEN, ABSIGROB TO All!!!- swnpmv, a coaronmron or swnmm.

PLLATEN PRINTING-PRESS AND THE LIKE.

Pat cnted Mar. 13, 1917.

Application filed December 7, 1015. serial No. 05,511 a.

To all whom it moi/concern:

Be it known that I, (-lus'rar .HJALMAR Lixos'l'uimfai subject of theKing of Sweden, and resident of Engelbrektsgatan 38, Gottenborgfl in theKingdom of Sweden, have. invented certain new and useful Improvements inPlaten Printing-Presses and the like, of which the following is aspecification, reference being bad therein to the accompanying drawings.

The inkgluscd in printing well known, generally toug owing to whichfact'the paper forced against the form adheres -to the same with arather great power, so that thin paper sheets can be torn asunder whilethey are separated from the form. This invention relates to a deviceadapted specially for automatic platen printing presses for facilitatinthe separating' .of the paper sheet from the cm, the said de iceconsisting of one or more conduits for compressed air, which conduitsupplies an air current into the space between the pa'persheet and theprinting form, which forces its way between the paper sheet and the fonnand thiis facilitates the separating of the {paper sheet. Through theprovi ion of; a deflector-at the mouth of the said conduit, the aircurrent can be brought to pass either in the said direction, while the ris separated from the form, or, wl ii le the paper sheet'is moved tolies in such direction, that theair subjectskglie paper sheetto a slightstretching o tion and prevents the sheet from being- In the acco yindrawings a vplaten printing press provide with a paper sheet separatingdevice arranged in accordance with this invention is shown, in Figure 1,in a side view and in Fig. 2 in a planview. Fig. 3 shows a detail. Onlysuch parts of thepre ss are shown as are necessary for the eiiplainin ofthe invention.

The -invent1on is shown applied to a platen printing pros, in which thepaper sheets are moved automatically to the form and from the same.- 1is'the form su port, 2 is the collection of types or't e so calledprinting vform, mounted on the said support, and 3 is the platen carriedby two arms 6-swingab1e are nd pins 4 fixed in .the frame 5 of the dressplaten. 3 iamoved toward andgfrom the arm 'by- -two links 7 pivoted tothe-platen.

resses is, as.

. The said 1 and connected with crank disks 8, provided with cogs. Thedisks B'are fixed to a common shaft 9 and are rotated by pinions 10 onthe driving shaft 11 of the was. When the platen 3 has been moved romthe form 2, a transporter, carried by two swingable arms 12 (one onlyuhown in the drawin s), is moved to the paper iles on the eed tables 13and carries with itself the top paper sheets during; its return stroke,which sheets are then plazed on the platen 3 and engaged by grippelsprovided on the same.

As the said transporter and grippers may v be of any suitableconstruction and form no part of this invention they are not closerdescribed. The platen together, with the paper sheets are then moved tothe printmg form. When the printing operation has been effected, t1 1eplaten 'is returned accompanied by the papersheets. a, Fig. 1,designates a paper s heet. Forfacilitating the separating of the iapersheets respectively from the printing iorm the/mouth of a conduit forcompressed air is, according tothis invention, located. at the edge ofthe form,

at 'which the separating of the papersheet is started during the returnstroke of the platen, from which mouth an air current.

is forced betwee the pa er sheet andthe form. Accordi do the awin thecompressed air is supplied by a an 14 and passes through a pipe 15,provided ,at its end with-a wide mouth piece 16, which eun tends to thevicinityof the top edge of the printing form and may have such'adirecttion, that the air, supplied by'the fan, is

forced as a'broad current into the space hetween the 'paper' sheet,partially separated from the printing form, and the said form and inthis manner, separates or assists in" separating the paper sheet fromtheform.

separate the paper sheet fromthe pri form, the curve shaped mouth pieces directed more downward than shown in the drawings.

If the'object of the air current only-we air current leaving; the mouthpiece to pass into the space between the paper sheet and thelpnntingform a defiector i's' necessary In the irawingsthe mouth piece. 16 hassuch a. direc tion, that, for causing the provided atthe mouthpiece. Thesaid deector consists of a curved shaped disk 17,

the curvature of which corresponds to the curvature of the outer side ofthe mouth piece 16, bent d(wnwardly, -Fig. 2, The

said disk 1.7 is carried by two arms 18, tixed to a shaft 19 journaledin the frame of the printing press. The length of the arms 18corresponds substantially to the radius of curvature of the outer side.of the mouth piece. To one of the arms 18 a link 20 is pivoted, theother end ofwhich is pivoted to an arm 22. swingring, around a pin 21 inthe frame. The said arm 2'3 is acted upon by (1 spring 23 fixed to theframe of the. printmg press and tort-nae a roller 24- on the arm 22against a cam 25. which is provided on a shaft 2 6 jonrnaled in theframe. The said shaft 26 is rotated by the shaft 5) by means of a e'ear27, 2b. During the rotation of the shaft 26 the. cam 25 swings the arms18 downward by means of the arm 22 and the link 20, so that the disk 17is brought into the. position shown in Figs. 1 and 3. In the saidposition the air current is directed into the space between the papersheet and the printing form. Consequently. the disk 17 occupies the saidposition, while the platen is moved from the. printing form. During thecontinued rotation of the shaft 26 the. cam 25 is brought. out ofcontact with the roller 24- and permits the spring" 22-3 to swing thedisk 17 upward. The end of the. mouth piece has such directioln that,when the disk 17 has been moved upward, the. air current passing, fromthe .month piece has a forward aml downward diree-' tion. The diskoccupies its upper position and the air current. has the direction justmentioned, while the transporter moves the )aper sheets from the table1?) to the platen. he. ai'r current is then substantially parallet tothe paper sheets, moved upward by the transporter and hanging freelydown from the same. and slightly stretches thepaper sheets so that theyare preventml from folding or being brought into incorrect position onthe platen. Moreover the air current causes the paper sheets to fit moreclosely to the platen. The force of the air current is controlled bymeans of a cook 29 provided ing press for the. printing of two sheetsi'multaneously but may evidently be ap 5 1 to )rinting presses providedwith only one feet table or more than two tables.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In a platen printing" press the combination of the form support, theplaten and a device, which, while the paper sheet is moved from theprinting form, forces air between the paper sheet and the formforfacilitating the separting of the paper sheet from the form.

2. In a. platen printing press the colllbination of the form support,the. platen, a. feed table for the paper sheets to be printed, atransporter or the. like, which. moves the sheets to the platen, meansprovided on the platen for holding the sheet during the printingoperation. a conduit for compressed air, a deflector provided at themouth of the said conduit, and means for Phangine; the position of thesaid deflector, so that the air passes either into the space between theplaten and the form, against the sheet, moved by the transporterto theplaten. and from the edge of the sheet held by the. transporter forpreventing the sheet from being folded, or into the space between thesheet and the form for facilitating the separating of the. sheet fromthe form.

In witness whereof, I have hereunto signed my name.

GUSTAF IIJALMAR. tmns'raem.

